Improvement in saw-filing machine



, sitedl tant.

CHARLES P. CASE, or TROY, PENNSYLVANIA.

Letters Patent No. 92,266, dated July 6, 186?l IMPROVEMENT IN SAW-FILINGMACHINE.

The Schedule referred lto in these Letters Patent and making part ofthesame.

To all whom it may concern.-

\ Be it known that I, CHARLES P. OASE, of Troy, iu

the county of Bradfbrd, and State of Pennsylvania, .have invented a newand valuable Improvement in Saw-Filing Machine; and I do hereby declarethat the following is a full, clear, and exact description of theconstruction and' operation of the same, reference being had to theannexed drawings, making a part of ythis specification, and to theletters and iigures of reference marked thereon.

Figure l of the drawings is af front view of my inventiou.

Figure 2 is a sectional View through line y y ofig'. 1.

F'gnre 3 is atop view, showing machine applied to circular saw'.

Figure 4 is a view of file-holder and slide.

My invention relates to devices for Bling mill-saws; and

It consists mainly in constructing and arranging means whereby the teethof either Straight or circular saws may be led with perfect accuracy,and with great despatch, either by a belt or gear from machinery, or byhand-power.

The letter A of they drawings represents a frame constructed of anL-form, as shown on fig. l, upon the front or longitudinal part ofwhichI attach the hollow bedplate B, and cross-heads c, in the mannerrepresented.

Resting and arranged to slide upon these cross-heads c is the frame I).fIt is adjusted and attached to said cross-heads by means of slidingboxes, which clasp said cross-heads, and are united to said frame bymeans of screws, as shown at cl in fig. l.

The letter E represents a ratchet-wheelconnected with the shaft c, whichsaid shaft has a screw` cut on its rear end, that works in a thread cntin the head of a standard at the point g. This crank-pinion and shaftfurnish means by which the frame D is moved back and forth upon thecross-heads c.. It is drawn forward by means ofthe crank, and is movedrearward usually by means hereinafter mentioned.

The letter h represents a lever, attached atits front or lower end tothe Shaft lc bymeans of a sleeve-head, while its rear or top end restsloosely upon the shaft o, described hereafter.

The letter t represents a spring attached to the front bar of frameD,fand is slotted to receive and hold the lever It, as shown.

The lever k is pivotedto an arm extending from the front side oi' frameD. It is notched near its top, as shown in iig. 3, to adapt it for workin the side of the slot in spring i, in which it rests. llhe office ofthese notches, in combination with the spring 1', lever h, and

Iset-screw I, next mentioned, is to raise, lower, and regulate the pawlsn, as hereinafter set forth.

.the pitman.

not attached so firmly in the slots y ,as to prevent this Y Letter l isa thumb-screw, arranged as shown.

The letters n represent pawls afixed to the side of lever hfand they areunited with the springt' by means of chains or cords, as shown. rIhesepawls actnate the ratchet-wheel E, and in conjunction with the devicesheretofore and hereafter described, serve to move the frame D rearward,and feed the files to the saw. By using two pawls I am enabled to movethe pinion half a notch at ea'ch revolution ofthe machinery, and I maymove it still more slowly by the use of additional pawls.

The letter H represents a band-wheel, to which I sometimes apply a crankfor hand use.

The letter o represents a shaft, to which the'wheel H is connected. Thisshaft rests upon the frame D in suitable journals, and serves as theworking-shaft Y ofthe machine.

The letter o is an arm extending from 'the front side of shaft H, insideits wheel, and letter s is an arm attachedto the rear end of said shaftat the rear of the frame D. .y

rlfhe arm r has a catch or pin near its upper end, which, ateachrevolution of shaft H, serves to raise the top end of lever Tt, andthereby operate the pawls above described.

The letter K represents a pitman, attached at one end to arm s, and at.the other to the filing-frame P, in the manner shown. I attach to therear side of. frame D a sliding frame, which moves longitudinally,thereon, and -which I call the filing-frame. It is attached to frame Dby grooves and iianches, lor by any other suitable means, my objectheilig to givefit easy play, and arrange it for lubrication in the bestpossible manner. -It is marked P on the drawings. y

The letters o represent arms attached to the rear side -of frame P, andare made adjustable thereon by meansof slots and set-screws, as shown infig. 4.

In the arms c, and in the manner represented on fig.

4 and 3, I attach two files by means of suitable set-v screws. They areplaced in an angular position with each other, and thereby adapted towork-upon-both the top and bottom of a saw-tooth at the same time.

The plate by which the frame I? is united to frame D has slottedopenings for screws, as shown at y on fig. 3. rlhe object of this deviceis to give the fileframe a lateral movement, and thereby to relieve thefiles from the saw-tooth at each return movement of It must. be observedthat thescrews are lateral movement of the file-holder.

, rlhe above and foregoing devices are intended more particularly forfiling circular saws, although they are susceptible of use for manyother purposes.

To file an upright saw, I make use of the devices i shown on theright-hand .portion of tig. 2, and which are partially represented onfig. 1. They consist mainly in a hinged frame, adjustable at any desiredangle, and removable at will, in which an upright saw may be s ccurelyheld and adjusted vertically, or sidewise, and thereby brought to thetiles above mentioned in any desirable manner.

The letter R represents the hinged frame attached to the rear end offrame A.

lhe let-ters S are plates attached to frame A, and extending upward bythe sides of frame R, and having out in them respectively slotscorresponding to segments of eireles. I

The letters a are thumb-nuts, arranged to work in the slots last abovementioned, and secure the frame I in the position desired.

`The letters e' represent a series of rollers, operated by the bevelledpinion-gear shown on fig. 2.

The saw to be filed is placed, and is held between these rollers c' inthe manner shown on said fig. 2, and it is moved forward at will bymeans of the pins al', that rest against its back, and are operated bvmeans of the screw and crankJ markedT.

, The saw is moved up or down by means of' the crank and bevelled gearoperating the rollers e.

One great advantage secured by the mode'of adjustment'provided by thecircular slots and thumb-nuts in the plates S is, the operator can adaptthe position ot' the saw to the shape in which he desires to form thetooth, and thereby adapt it to the kind of timber in which he desires touse sueh'saw.

By means of the screw anderank 'l, the pins d', thumb-screw l, (whichoperates to lift the pawls from their ratchet,) and the other devicesmentioned for holding an upright saw firmly in place, I am enabled tokeep Such saw properly gauged by the tiling-process alone,and therebysecure another important advantage.

fie-2te The L-portiou of frame A is dovetailed into the main frame, andthereby made removable at will.

This device is essential, for the reason that,lin-iliug circular sawsthe L-portion should be entirelyde tached. l

Between the lever K and the front side of' the frame, and resting uponthe arm in which said lever is pivoted, l affix a block" of solid Indiarubber, that serves as a spring to aid the movements of said lever. Isometimes also place similar blocks of India rubber'between the rollerse' and the frame thereof, or upon the jonrnals of said rollers, to aidin the movements of. the4 thumb-nuts a', pins cZ, crank and screw T, andbevelled gear, as described, constructed and arranged to operatesubstantially as and for the purposes specilied. 4. The above-describedmachine for filing san s, both on the upper and lower side of a tooth,at one operation. i

In testimony that I `claim the above, I have hereunto subscribed myname, in the presence of two wit,-

nesses.

CHAS. P. CASE. Witnesses: f

JAMES I. Gnnvns, A. G. HEYLMUN.

